Many medical procedures rely on detailed analysis of the human motion apparatus. In this context correspondences between motion patterns and hidden physical parameters like joint torques are highly interesting. To gain accurate information about the correlation between patient specific body parameters, the internal forces acting on joints and a healthy movement, a framework is required, that combines all of these characteristics.
The project aims at a direct access to physical properties of an investigated motion without the necessity of tedious simulation using inverse or forward dynamics. By use of a statistical model the computational expense can be reduced and the need for expensive equipment like force plates is extinct.
The physical parameters that describe joint torques are learned by simulating a moving subject based on a mass spring model. It consists of rigid segments linked by joints that are driven by torsional springs acting as muscle and tendon forces.